Automatic machine for casting metal under pressure



O. ECKERT AUTOMATIC MACHINE FOR CASTING METAL UNDER PRESSURE Filed Jan. 29, 1925 2 Sheets-Sheet I Oct. 4,1927. O ECKERT 1,644,054

AUTOMATIC MACHINE FOR CASTING METAL UNDER PRESSURE Filed Jan. 29, 1925 2 Sheets-Sheet 2 lin li',

Patented. oa. 4, 19 z7.`

UNITED s'rpfnzsl PATENT OFFICE.

mm" o NUMEBG GERMANY. AssIGNon 'ro rnaomonsaUse-nm' p @man normar, or Nunnnnae, navanu, enum.

' Application nled January 29, 1925, Serial Io. 5,591, and in Germany lebruary' I, 19M.

This invention relates to an automatically acting machine for casting metal under pressure in which the movements of the mould f which are necessary for producing castings,

o on the shaft of the machine.

'According to the invention a machine is provided in which the cam disc keyed on the shaft of the machine is of symmetrical shape and in which the to' and fno movement u of the sliding plate which carries the mould parts is effected by an oscillatable fork. the rollers of which bear on the circumference of the cam disc the line which connects the centres of the rollers extending always v along a diameter of the cam disc. v y

An embodiment of the invention -is shown, by way of example, .on the accompanying drawing, in which Ig. 1 shows the machine in longitudinal section partly in side elevation.

Fig. 2 is a plan view of Fig. 1.

Figs. 3. 4 and.5 show Aon enlarged scale the c am disk for the oscillable fork in three diierent positions. f j Figs.l6, 7 and 8, 9 show the arrangement of the guide plate for the operating lever of theone element ofthe mould in side ele-t vation, plan view, sect-ion on line VIII-VIII Aof Fig. 7 and view from below rdspectively.4

I'nJFigs. 1l andv 2 the machine is shown, the mould. being open and the cam disk being shown in the position in which, when y it continues to rotate in the direction of the arrow. effects the closing-of the mould and the advancing of the closed mould towards the stationary nozzle.

The under frame of the machine is coml posedA of'two cross supports 1 and 2 and of brackets'v 11, 12 are fixed which carry movable sleeves 13, 14 tothe inner ends 'of which the mould elements 15n and A15h are removably fixed (Figs. 6 and 7). In sleeve 14 an e]ecting device of known type is arranged which serves for expellingk the casting. As this ejectin'g devicedoes not form part of the invention it is neither illustrated on the drawing nor will it be hereinafter described.

On the front part of `the vbed plate 9 two brackets 16, 17 are fixed in which a driving shaft 18.for a cam disk 19v is journaled. This cam disk 19 `is of symmetrical form. The shaft 18 is driven .by a spur wheel 20 meshing with a gear wheel of smaller size situated below said spur wheel and driven by a belt pulley keved on the same shaft as said gear wheel. The ends of an oscillable fork 21, 21a :pivotally mounted on a pivot bolt 22 bear against the cam disk 19. In the lends of-the armsof fork 21, 21Il rollers 23, 24 are mounted the pivot axles of which are in alignment with the axis of shaft 18. To the oifsetend 25 ofthearm 21Il of the fork 21, 21 a connecting rod 27 is hinged the other end of'whi'ch is pivotally mounted on the slidable plate 10. On the plate 10 a shaft 28 is mounted on which two short levers 29, 30'and keyed. y

The ends of the. long levers 31, 82 are hingedly connected by rods 38, 34 with the brackets 16, 17, the ends of the short levers 29, 30 being hingedly yconnected with the inner arms37, 37" of two elbow levers 38 by means of levers 35, 36 of adiustable length. The two outer arms 39, 39 of the elbow levers which. :areada-pted to swing around bolts 41, 42 are hingedly connected by means of bolts 45, 46 with rings 43, 44 fixed on the sleeves 13, 14. AOn shaft 18 is further keyed .a cam disc 47 against which bears a 'roller 48 mounted in the end of one arm 59* of a two-armed lever 50, 50" oscillably mounted on a bolt 49, the other arm .50" of said lever being connected, on the one hand to a spiral spring 51 and, on the other hand, by means o'f a rod 52 of adjustable length with the..

pressure lever 54 which controls the rod 58 of the pressure piston. y

If the cylindricalcircumference of one of the two mould elements is composed of 'several segments, which have parts projecting two long levers 31, 32 are inwardlyin relief and-which are adapted to ference is composed of Y several segments is be pushed together toform a cylindrical also completely closed by theI adjusting leverI hollow body and to be pulled away from one 57 'which engages with the oblique slot 58 of other, the closing /the direction of arrow w its-projecting cam the machine.

. fork 21, 21a.

another in the well known manner by means disk 59.

of articulated levers, so that the projecting When part d of cam disk 19 has come in parts are withdrawn in to the mould when contact with the roller l23 the part a is near the segments are pulled ,away from one anthe roller 24 of the outer arm 21 of fork 21,

the opening of the same for releasing the gins. Fork 21, 21a is swung in opposite dia core 1s effected in sucha manner that the rection as before until part d isagain in conof this mould element and '21 (Fig. 4) and the backward movement be-A adjusting lever 57 Figs. 6, 7 engages with tact with roller 24 Owing to the backward anoblique slot 58 of a circular disk 59, which movement of the slidable plate 10 the levers is adjustably-mounted on a-plate A10 bybolts are swung in'opposite direction as before, and grooves 60a in said disc and is adapted the mould is opened and removed from the to belocked in the adjusted position, so that, nozzle, the casting is expelled in the well in accordance with the required oscillating known manner by the lejecting device accommovement of the adjusting lever 57 the s lot modated in sleeve 13, the segments of the cir- 58 can be made more or less oblique (Figs..5, 'cumference of the mould element 15,a are 6, 7, 8). Theie'nds of the adjustable plate 60 pulled backlinto the. mould by the action of have studs 61, 62 engaging with bores of the adjusting lever 57 and the two-armed lugs 63, 64 on the brackets 11, 12. When lever 50", 5()b is made ready for use by the .the sleeve'13 is advanced ormoved back'the action of cam disk 47 in opposition to the adjusting lever 57 engaging with-the obaction of the spiral spring .51.`

The operation begins again so .that at vone direction of oscillation and the circumfersingle revolution of the cam disk one casting,

ence of the mouldv element 15ll is closed or or when several moulds are united-to one opened. mould, several castings are produced. A y

The operation of the machine is as folwheel 55 on driving shaft 18 serves to overlows: When the 'cam disk 19 is rotated in come greaterresistances at the starting of .a (Fig. 1) comes in contact with the roller I claim 23 of the inner arm 21Il of the oscillable The fork 21, 21*` is consecasting metal under pressure comprising in quently swung to the left and the slidable combination with themain shaft of the maplate 10 with the sleeves 13, 14 mounted in `.chine and with the mould composedof sevthe brackets 11, 12 and carrying the mould eral elements, a cam disc keyed on said main elements 15*.z 15" is moved towards the in-lv shaft said cam disc being of symmetrical jecting nozzle 6. At the same timethe pairs shape vand designed to controlall the operof levers 29. 30 and 31, 32 swingrelative to ations of the machine, a sliding plate'carrythe plate 10 in thev direction of the arrow 5:/ ing said mould elements. an oscillatable fork and the elbow levers 38 inthe direction of hingedly fixed to said sliding plate for comthe arrows Le. whereby the -sleeves- 13, 14 municating a to and fro movement to said which carry the mould elements 15". '15b are i sliding plate, and a rollerin the end of each I moved towards one another so that the arm of said forlesaid rollers bearing on the mould is almost closed. If now the cam b circumference of said cam disc so that the of cam disk 19 which is somewhat higher line which connects the centres of said rollers than cam a is advanced towards the roller extends always along a diameter of said cam 23`(Figs. 3 and 4l a further shifting of the disc. .1 lever system is effected, the mould elements f 2. An automatically acting machine for 15, 15b are completely closed and brought casting metal under pressure comprising in close to the injecting -nozzle 6 so that this combination with the main shaft of the manozzle projects into the inflow channel 56 chine and with the mould composed of sevof the mould. In the meantime the ineral elements. a cam disc keyed on said main wardly curved part c of cam'` disk 47 `has shaft said cam disc being of symmetrical come in contact with the roller 48 of the shape and designed to control all the opertwo-armed lever 50a. 50" (Fig. `13) and at ations of the machine, a sliding plate carrythis instant the lever 50, 50b icl-pulled down ing said mould elements. an oscillatable fork by the action of the spi-ral spring51 and the hingedlv fixed to said sliding plate for comrod 53 of the pressure piston which is conmunicating a to and fro-movement to lsaid nected wvith arm 50,h by COIlIleCIlg IOd 52 sliding plate.. a roller in the end of each arm a'nd lev" 5 4 is operated suddenly vwhereby of said fork rsaid rollers bearing on the cir the mOltD metal iS 'injected Under- PIeSSllIe cumference of said cam disc so 'that the line from the vessel through the nozzle 6 into the which connects the centres of said rollers mould. At the closing of the mould thel extends always along a'diameter of said cam mould element '15", the cylindrical circumdisc, two sleeves, carrying each -one of said said brackets of the sliding plate so that at the torand fro movement of said sliding' plate said elements of the mould are closed or opened transversely to the longitudinal 10 axis of the machine.

In testlmony whereof I aix my signature.

, OTTO EGKERT. 

